The same principle has been used in woodworking for quite a long time.
My father learned it from his grandfather for cabinet making. I am
currently watching the British '70s television series Connections.
Re-inventing things over the centuries is quite common. The problem
which needs to be solved pushes the imagination of the builder into
crafting similar answers.
73,
Kevin. KD5ONS
On 03/16/2018 03:37 PM, Don Wilhelm wrote:
Wes,
If you are referring to the aluminum angle stock, I used that back in
1960 when constructing a amplifier. I did not think I "invented" it,
and at that time I did not have a drill press, just a hand drill and a
tap, so the holes were not precisely spaced. It worked well, and
complied with the TVI problem of that time (put everything in a
shielded box).
73,
Don W3FPR
On 3/16/2018 4:28 PM, Wes Stewart wrote:
Johnny come lately: I invented them in nineteen seventy something.
And mine really are 3D :-)
http://sadxa.org/n7ws/K7CVT_Amp_Input_Compartment.jpg
Overall views here: http://sadxa.org/n7ws.html
Wes N7WS ex K7CVT
On 3/16/2018 12:36 PM, Wayne Burdick wrote:
But they *do* allow you to join two enclosure planes while also
supporting a PCB or other hardware. That was the intent of the
design. (I invented these in 1998 :)
Wayne
N6KR
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